Syncing is a bit of an issue as you can't sync based on last changed file. So, my solution is that each device has it's own folder that it syncs up to, and each device syncs down all other folders. For my two devices, nb and be, I have thus set it up like this:

If I do work on a file on Be I then copy it to bedrive, and edit it. To edit it late on Nb I copy it from bedrive to nbdrive and edit it. Of course I could always sync manually and avoid this, but the above is a solution for people who might not feel comfortable working on the command line or if you want everything automated.